Some numbers are not normally distributed. If the mean of the numbers is 38 and the standard deviation is 6, what proportion of values would fall between 26 and 50? What proportion of values would fall between 14 and 62? Between what two values would 89% of the values fall?

Q: . A population has a mean of  80 and a standard deviation of  20. a. Would a score of X 70 be…

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Q: In a survey, the mean weight of 1026 rats was calculated to be 132 gr. The standard deviation of the…

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Q: According to the rules of probability, if a sampling distribution has a standard error of .45, the…

A: Solution: From the given information, the standard error of the sampling distribution is 0.45.

Q: we assume the population mean is 98.60 and the standard deviation is 0.65, what is the probability…

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Q: The university campus has a record of temperatures in recent years, which have a mean of 25.5…

A: To test whether the data follows normal distribution or not, let us consider Chi-square test for…

Q: 1. Suppose that the mean of A is 360 and the standard deviation of A is 40. The mean of B is 45 and…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: or a distribution, the mean is 100 and the standard deviation is 4.  If a data value x has a value…

A: Given data,Mean μ=100sd σ=4If x=90z=?

Q: Two students, Emily and Jeremy, go to different schools and want to find out who has a higher GPA…

A: Given data,

Q: a. A student whose grade is 83 would be at the 19th percentile. b. A student whose grade is 90 would…

A: According to our guidelines, we can answer only three subparts, so please repost the rest parts.

Q: statistics professor reported that the mean score in a recent quiz is 72 and the standard deviation…

A: Solution

Q: In a given school year, the ACT test mean score was 21 with a standard deviation of 4.9.  The same…

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Q: Mikayla and Kathryn began arguing about who did better on their tests, but they couldn't decide who…

A: the students' test grades in the Art History class had a mean of 72 and a standard deviation of 9.3,…

Q: uppose a student got an examination score of 90 in Statistics and Probability, where the mean was 75…

A: We have given that.   X~N( μ , ?^2 )   μ=75     , ?=5  , X=90      for  istatistics and…

Q: The mean score and the standard deviation in the Statistics test are respectively equal to 80 and…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: If the probability of defective bolt is 0.1, find the mean and the standard deviation for the number…

A: Given the probability of a defective bolt is, 0.1 That is, p=0.1 The total number of bolts is, n=400…

Q: If a set of numbers has a standard deviation of zero, what can you say about the numbers?

A: The standard deviation indicates that amount of deviation of data points from the mean.

Q: The amount of pyridoxine in grams per multiple vitamin pill has a mean of 180 and a standard…

A: Given,mean(μ)=180standard deviation(σ)=24sample size(n)=64

Q: The residents of two towns both have a mean income of $30,000. Town A has a standard deviation of…

A: Mean income for town A and town B is $30,000. Standard deviation of Town A = $2600. Standard…

Q: Suppose a probability and statistics class took an exam that had a mean of 60 and a standard…

A: Given, E(X)=60 SD(X)=12   After 10 Point curve Let Y be new variable.

Q: Suppose that people's heights (in centimeters) are normally distributed, with a mean of 170 and a…

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Q: Omar is trying out to be a firefighter.  On the written exam, the mean of everyone who takes the…

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Q: If the average score on a statistics exam was 76, and the standard deviation was 7, what can you…

A: Given : The average score on a statistics exam was 76, and the standard deviation was 7

Q: In a Science test, the mean score is 42 and the standard deviation is 5. Assuming the scores are…

A: The mean is μ=42 and the standard deviation is σ=5 so it follows:…

Q: Ava scored a 92 on a test with a mean of 71 and a standard deviation of 15. Charlotte scored a 688…

A: HERE GIVEN , Ava scored a 92 on a test with a mean of 71 and a standard deviation of 15. Charlotte…

Q: In the final Examination in Statistics, the mean grade was 82 and the standard deviation was 8. In…

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Q: It is often quoted that in a normal distribution, 95% of the data lies 1.96 deviations either side…

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Q: In two statistics classes, section M and section N, the mean score of students in Section M is 49…

A: According to the provided information, The mean and standard deviation of section M is  μ = 49σ =…

Q: given a population of 5000 scores with mean is 86 and the standard deviation is 10, how many scores…

A: To solve this problem, we have to assume that the population is normally distributed. Let X denotes…

Q: the mean for the Verbal Reasoning section was 151 with a standard deviation of 9, and the mean score…

A: Note: According to bartleby experts question answers guidelines an expert can solve only first three…

Q: For a random sample of 55 overweight men, the mean of the number of pounds that they were overweight…

A: Given data, n=55 μ=32σ=4.1Point estimate μx=?

Q: The scores for a standardized reading test are found to be normally distributed with a mean of 300…

A: Given : mean = μ = 300 standard deviation = σ = 40 sample size = n = 490

Q: The mean of the population is 100 and the standard deviation is 15 (These are IQ values by the way.…

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Q: The standard deviation of the scores on a skill evaluation test is 290 points with a mean of 1286…

A: We have to find given Probability.

Q: In a Science test, the mean score is 42 and the standard deviation is 5. Assuming the scores are…

A: Solution: Let X be the score. From the given information, X follows normal distribution with mean…

Q: Suppose you have the population values 50 and 80 and that their corresponding z-scores are-1 and 2.…

A: Given : Suppose the population values 50 and 80 and that their corresponding z scores are -1 and 2…

Q: The Jackson triplets , Jenny , John and James , are in different algebra classes at city high . On…

A: The information about the final exams of Jackson triplets is provided as follows:   Xi μi σi…

Q: A distribution of numbers is approximately bell shaped. If the mean of the numbers is 129 and the…

A: a. The two numbers that would fall approximately between 68% of the given values are, Thus, the two…

Q: Suppose scores on a mathematics test have a mean 60 and standard deviation 20 while scores on an…

A: Given that Math -- mu = 60 ,s.d =20 ,x =80 Eng --- mu = 60 ,s.d =10 ,x =80

Q: Suppose you received a score of 95 out of 100on exam 11 . The mean was 79and the standard deviation…

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Q: Alex wants to find out: if the standard deviation of the mean for the sampling distribution of…

A: Solution: given standard deviations of sample s1=9. fir sample size n1=256  Then what will be the…

Q: Stacy and Danielle began arguing about who did better on their tests, but they couldn't decide who…

A: Obtain the z-score for Stacy's test grade. The z-score for Stacy's test grade is obtained below:…

Q: In a Science test, the mean score is 42 and the standard deviation is 5. Assuming the scores are…

A:

Q: The scores of 800 students in a 100-item exam resemble a normal distribution with a mean of 78 and a…

A: Let X be the random variable from Normal distribution with mean (µ) = 78, standard deviation (σ) = 8…

Q: The mean of 5 observations is 15 and variance is 9 if two more observation having values 4 and 10…

A: The mean of five observations is 15. Mean=1n.∑ixi∑ixi=5×15=75 Variance…

Q: If a normally distributed group of test scores have a mean of 70 and a standard deviation of 12,…

A: It is given that the mean is 70 and the standard deviation is 12.

Q: In ABC High School, the mean IQ test score of the first year students is 102 and the standard…

A: For the given data  What is the z-score of a student whose IQ test score is 106?

Q: Given a test that is normally distributed with a mean of 100 and a standard deviation of 12, find:…

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Q: A hiring company claims that the variance of the annual salaries for managers is greater in Florida…

A: Let, For Florida, s1 =sample sd = 11000 σ1= population sd n1 = 28 For Georgia, s2 = sample sd =9200…

Q: A population has μ = 50 and σ = 5. If 10 points are added to every score in the population, what are…

A: Consider, (µ) = 50 and (σ) = 5 Let, X be the scores of the population. If 10 points are added to…

Q: Suppose the main percentage in algebra is 70% and the standard deviation is 8% What percentage of…

A: Given,  mean value(μ) =70%  standard deviation(σ) = 8%Z=x-μσZ1=62-708=-1Z2=94-708 =3

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.